Method for manufacturing container by using starch and grain powder

ABSTRACT

A method for manufacturing a combustion resistant and water resistant large container is disclosed. A starch or cereal powders are mixed with water at a certain ratio, and the mixture is heated to a certain temperature so as to form a glue. A drying is carried out, a powderizing is carried out, and then it is mixed with powders of a natural resin (rosin). Then this mixture is mixed with water, and then, it is fabricated by using a fabricator.

This application claims benefit under 35 U.S.C. 371 of PCT/KR00/00893filed Aug. 11, 2000.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a method for manufacturing a containerfor one time use, which is naturally decomposed. Particularly, thepresent invention relates to a method for manufacturing a combustionresistant and water resistant large container in which a starch orcereal powders are mixed with water at a certain ratio, the mixture isheated to a certain temperature so as to form a glue, a drying iscarried out, a powderizing is carried out, then it is mixed with powdersof a natural resin (rosin), then this mixture is mixed with water, andthen, it is fabricated by using a fabricator.

2. Description of the Prior Art

Generally, the containers for one time use are classified into:containers made of plastic materials, containers made of papers, andcontainers made of agricultural byproducts. The containers made ofplastic materials cannot be made to be naturally decomposed, and whenburning them, toxic gases are produced, thereby polluting theenvironment. Some containers made of papers for containing water arecoated with a plastic film, and therefore, the recycling of them isdifficult. The containers made of agricultural byproducts aremanufactured by recycling the agricultural byproducts, and are naturallydecomposed, thereby excluding the environmental contamination. However,the fabricating process is complicated, and much handy works arerequired, this being a troublesome feature.

SUMMARY OF THE INVENTION

The present invention is intended to overcome the above describeddisadvantages of the conventional technique. Therefore it is an objectof the present invention to provide a method for manufacturing acombustion resistant and water resistant container, in which 80 wt % ofcorn starch, potato starch, wheat flour, rice flour or barley flour ismixed with 20 wt % of water, an agitation is carried out, a heatingcarried out to a temperature of 100 degrees C. to form a glue, a dryingis carried out, a powdering is carried out, then 70 wt % of this powderis mixed with 15 wt % of rosin and 15 wt % of water, and then afabrication is carried out by using a fabricator with 5 Kg/square cm.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The container of the present invention is composed of corn starch,potato starch, wheat flour, rice flour or barley flour, and rosin (whichobtained by removing terebene oil from a resin).

EXAMPLE 1

Corn starch in an amount of 80 wt % was mixed with 20 wt % of water, andthen an agitation was carried out for 30 minutes.

The revolution speed of the agitator was 60 rpm. After the completion ofthe agitation, a heating was carried out at a temperature of 100 degreesC. until a glue was formed, so as to improve the sticking property. Theheated and aged glue was dried. The dried glue was powderized. The agedcorn starch in an amount of 70 wt % was mixed with 15 wt % of rosin, andthen an agitation was carried out. The above mixture was mixed with 15wt % of water, and then an agitation was carried out for 30 minutes. Therevolution speed of the agitator was 60 rpm. Upon completion of theagitation, a mixture which was felt like a moist saw dust was formed.The above mixture was put into a fabricator at a temperature of 250-350degrees C., and then a pressure was applied at 5 Kg/square cm, therebyfabricating a container.

EXAMPLE 2

Potato starch in an amount of 80 wt % was mixed with 20 wt % of water,and then an agitation was carried out for 30 minutes. The revolutionspeed of the agitator was 60 rpm. After the completion of the agitation,a heating was carried out at a temperature of 100 degrees C. until aglue was formed, so as to improve the sticking property. The heated andaged glue was dried. The dried glue was powderized. The aged potatostarch in an amount of 70 wt % was mixed with 15 wt % of rosin, and thenan agitation was carried out.

The above mixture was mixed with 15 wt % of water, and then an agitationwas carried out for 30 minutes. The revolution speed of the agitator was60 rpm. Upon completion of the agitation, a mixture which was felt likea moist saw dust was formed.

The above mixture was put into a fabricator at a temperature of 250-350degrees C., and then a pressure was applied at 5 Kg/square cm, therebyfabricating a container.

EXAMPLE 3

Wheat flour in an amount of 80 wt % was mixed with 20 wt % of water, andthen an agitation was carried out for 30 minutes. The revolution speedof the agitator was 60 rpm. After the completion of the agitation, aheating was carried out at a temperature of 100 degrees C. until a gluewas formed, so as to improve the sticking property. The heated and agedglue was dried. The dried glue was powderized. The aged wheat flour inan amount of 70 wt % was mixed with 15 wt % of rosin, and then anagitation was carried out. The above mixture was mixed with 15 wt % ofwater, and then an agitation was carried out for 30 minutes. Therevolution speed of the agitator was 60 rpm. Upon completion of theagitation, a mixture which was felt like a moist saw dust was formed.

The above mixture was put into a fabricator at a temperature of 250-350degrees C., and then a pressure was applied at 5 Kg/square cm, therebyfabricating a container.

EXAMPLE 4

Rice flour in an amount of 80 wt % was mixed with 20 wt % of water, andthen an agitation was carried out for 30 minutes. The revolution speedof the agitator was 60 rpm. After the completion of the agitation, aheating was carried out at a temperature of 100 degrees C. until a gluewas formed, so as to improve the sticking property. The heated and agedglue was dried. The dried glue was powderized. The aged rice flour in anamount of 70 wt % was mixed with 15 wt % of rosin, and then an agitationwas carried out. The above mixture was mixed with 15 wt % of water, andthen an agitation was carried out for 30 minutes. The revolution speedof the agitator was 60 rpm. Upon completion of the agitation, a mixturewhich was felt like a moist saw dust was formed. The above mixture wasput into a fabricator at a temperature of 250-350 degrees C., and then apressure was applied at 5 Kg/square cm, thereby fabricating a container.

EXAMPLE 5

Barley flour in an amount of 80 wt % was mixed with 20 wt % of water,and then an agitation was carried out for 30 minutes. The revolutionspeed of the agitator was 60 rpm. After the completion of the agitation,a heating was carried out at a temperature of 100 degrees C. until aglue was formed, so as to improve the sticking property. The heated andaged glue was dried. The dried glue was powderized. The aged barleyflour in an amount of 70 wt % was mixed with 15 wt % of rosin, and thenan agitation was carried out. The above mixture was mixed with 15 wt %of water, and then an agitation was carried out for 30 minutes. Therevolution speed of the agitator was 60 rpm. Upon completion of theagitation, a mixture which was felt like a moist saw dust was formed.

The above mixture was put into a fabricator at a temperature of 250-350degrees C. and then a pressure was applied at 5 Kg/square cm, therebyfabricating a container.

EXAMPLE 6

A natural starch in an amount of 70 wt % was mixed with 15 wt % ofrosin, and then an agitation was carried out for 30 minutes. Therevolution speed of the agitator was 60 rpm. The above mixture was mixedwith 15 wt % of water, and then an agitation was carried out for 30minutes. The revolution speed of the agitator was 60 rpm. Uponcompletion of the agitation, a mixture which was felt like a moist sawdust was formed.

The above mixture was put into a fabricator at a temperature of 250-350degrees C., and then a pressure was applied at 5 Kg/square cm, therebyfabricating a container.

According to the present invention as described above, a starch orcereal powders are used as the raw material, and since the starch or thecereal powders are food, any hygienic problem is excluded. Further, thestrength of the container can be adjusted by varying the amount of therosin, and therefore, its application field and its usefulness are verywide. Further, the color of the starch and the cereal powders are white,and therefore, the coloring of the container is easy. The ingredients ofthe mixture is simple, and therefore, the manufacture can be speedy.When discarding the container, it is naturally decomposed, therebyexcluding any environmental contamination.

What is claimed is:
 1. A method for manufacturing a container by using astarch or cereal powders, comprising the steps of: mixing 80 wt % ofcorn starch and 20 wt % of water, and carrying out an agitation for 30minutes at 60 rpm to form a mixture: carrying out a heating on themixture at a temperature of 100 degrees C. until the mixture forms aglue, so as to improve a sticking property; drying the glue andpowderizing the glue; mixing 70 wt % of the corn starch (thuspowderized) with 15 wt % of rosin, and carrying out an agitation;further adding 15 wt % of water, and carrying out an agitation to form apaste; and putting the paste into a fabricator at a temperature of250-350 degrees C., and pressing the paste with a pressure of 5Kg/square cm, whereby the container is manufactured.
 2. A method formanufacturing a container by using a starch or cereal powders,comprising the steps of: mixing 80 wt % of potato starch and 20 wt % ofwater, and carrying out an agitation for 30 minutes at 60 rpm to form amixture; carrying out a heating on the mixture at a temperature of 100degrees C. until the mixture forms a glue, so as to improve a stickingproperty; drying the glue and powderizing the glue; mixing 70 wt % ofthe potato starch (thus powderized) with 15 wt % of rosin, and carryingout an agitation; further adding 15 wt % of water, and carrying out anagitation to form a paste; and putting the paste into a fabricator at atemperature of 250-350 degrees C., and pressing the paste with apressure of 5 Kg/square cm, whereby the container is manufactured.
 3. Amethod for manufacturing a container by using a starch or cerealpowders, comprising the steps of: mixing 80 wt % of wheat flour and 20wt % of water, and carrying out an agitation for 30 minutes at 60 rpm toform a mixture; carrying out a heating on the mixture at a temperatureof 100 degrees C. until the mixture forms a glue, so as to improve asticking property; drying the glue and powderizing the glue; mixing 70wt % of the wheat flour (thus powderized) with 15 wt % of rosin, andcarrying out an agitation; further adding 15 wt % of water, and carryingout an agitation to form a paste; and putting the paste into afabricator at a temperature of 250-350 degrees C., and pressing thepaste with a pressure of 5 Kg/square cm, whereby the container ismanufactured.
 4. A method for manufacturing a container by using astarch or cereal powders, comprising the steps of: mixing 80 wt % ofrice flour and 20 wt % of water, and carrying out an agitation for 30minutes at 60 rpm to form a mixture; carrying out a heating on themixture at a temperature of 100 degrees C. until the mixture forms aglue, so as to improve a sticking property; drying the glue andpowderizing the glue; mixing 70 wt % of the rice flour (thus powderized)with 15 wt % of rosin, and carrying out an agitation; further adding 15wt % of water, and carrying out an agitation to form a paste; andputting the paste into a fabricator at a temperature of 250-350 degreesC., and pressing the paste with a pressure of 5 Kg/square cm, wherebythe container is manufactured.
 5. A method for manufacturing a containerby using a starch or cereal powders, comprising the steps of: mixing 80wt % of barley flour and 20 wt % of water, and carrying out an agitationfor 30 minutes at 60 rpm to form a mixture; carrying out a heating onthe mixture at a temperature of 100 degrees C. until the mixture forms aglue, so as to improve a sticking property; drying the glue andpowderizing the glue; mixing 70 wt % of the barley flour (thuspowderized) with 15 wt % of rosin, and carrying out an agitation;further adding 15 wt % of water, and carrying out an agitation to form apaste; and putting the paste into a fabricator at a temperature of250-350 degrees C., and pressing the paste with a pressure of 5Kg/square cm, whereby the container is manufactured.
 6. A method formanufacturing a container by using a starch or cereal powders,comprising the steps of: mixing 70 wt % of a natural starch powder with15 wt % of rosin, and carrying out an agitation for 30 minutes at 60rpm; further adding 15 wt % of water, and carrying out an agitation toform a paste; and putting the paste into a fabricator at a temperatureof 250-350 degrees C., and pressing the paste with a pressure of 5Kg/square cm, whereby the container is manufactured.